velero - Add sidecar & serviceEntry

General MR

Summary

As part of big-bang&160, we will want to enable users to configure setting REGISTRY_ONLY traffic policy on a per-package basis, in addition to allowing for it to be set globally in the meshConfig (see #1886). Creating Sidecars in each package will also allow us to focus on individual packages as we define what whitelists will need to be created per application.

Relevant logs/screenshots

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Linked Issue

[issue]#83 (closed)

Upgrade Notices

N/A

Closes #83 (closed)